The 'Aaron's Party' singer also boasted that he got the better of the four attackers because he has "a 6th degree black belt in Muay Thai", and thus would not press charges.

His older brother Nick was asked about the incident by Boston radio station Mix104.1, and admitted he was confused by Aaron's explanation.

"We've got, like, a pass in this town... and it's just a little strange the way the whole situation went down," Nick said. "But you know, it's my brother. He's young. I was young one time... I really don't know what happened."

Nick also mocked Aaron for saying that he has a black belt in Muay Thai, quipping: "He is not a black belt in anything. Dancing, maybe. Dance fighting."

The Backstreet Boys are to embark on a brief European mini-tour next week, starting on June 30 in London at Under The Bridge.